Answer:
7.16 × 10⁻³ M
Explanation:
Let's consider the reduction reaction of copper during the electroplating.
Cu²⁺(aq) + 2 e⁻ ⇒ Cu(s)
We can calculate the moles of Cu²⁺ present in the solution using the following relations.
- 1 mole of electrons has a charge of 96486 C (Faraday's constant).
- 1 mole of Cu²⁺ is reduced when 2 moles of electrons are gained.
The moles of Cu²⁺ reduced are:
of Cu²⁺ are in 0.300 L of solution.
[Cu²⁺] = 2.15 × 10⁻³ mol/0.300 L = 7.16 × 10⁻³ M
The anwser is B if that helps
Answer:
A) Electrons
A) 16-8=8 so it'd be 8
(Relative atomic mass - atomic number = neutrons)
A) 12
Same thing as last one.
31-15=16 ( did you type the wrong options if not then huh?)
Explanation:
Answer:
all atoms of a given element have the same number of protons but may have different masses
Explanation:
After the discovery of isotopes, scientists were able to conclude that all atoms of a given element have the same number of protons but may have different masses.
Isotopes are atoms of an element that have the same atomic number but different mass number.
The atomic number is the number of protons within an atom.
Mass number is the number of protons and number of neutrons.
Therefore, all atoms of a given element have the same number of protons but different mass.
Answer: Option (a) is the strong acid.
Explanation:
Hydrochloric acid is a strong acid and when it is added to water then the following reaction takes place.
where, is a conjugate acid and is a conjugate base.
Therefore, when we add HCl into water then it dissociates completely into hydronium ion and chlorine ion.
Thus, we can conclude that a strong acid is disassociated completely, producing more conjugate base.